<!DOCTYPE HTML>
<html>

<head>
    <meta charset="utf-8">

    <script type="text/javascript">
        function WebSocketTest() {
            if ("WebSocket" in window) {
                // 打开一个 web socket
                var ws = new WebSocket("ws://localhost:8080");

                ws.onopen = function () {
                    // Web Socket 已连接上，使用 send() 方法发送数据
                    ws.send("发送数据");
                    alert("数据发送中...");
                };

                ws.onmessage = function (evt) {
                    var received_msg = evt.data;
                    console.log(received_msg, 'received_msg')
                    alert("数据已接收...");
                };

                ws.onclose = function () {
                    // 关闭 websocket
                    alert("连接已关闭...");
                };
            }

            else {
                // 浏览器不支持 WebSocket
                alert("您的浏览器不支持 WebSocket!");
            }
        }
        WebSocketTest()
    </script>

</head>

<body>

    <div id="sse">
        <a href="javascript:WebSocketTest()">运行 WebSocket</a>
    </div>

</body>

</html>